Camphor tablets have several common uses, from relieving congestion to repelling insects to serving as part of religious rituals. How you use them depends entirely on the purpose, but one rule applies across the board: camphor is toxic if swallowed, and even small amounts can cause seizures. Doses as low as 500 mg have been linked to seizures and death in case reports. Every method of use keeps camphor outside the body or limits exposure to diluted vapor.
For Congestion and Cough Relief
The most common medicinal use for camphor tablets is steam inhalation to ease nasal and chest congestion. Camphor vapor activates cold-sensing receptors in your airways that help suppress cough reflexes and reduce the sensation of irritation. It doesn’t actually open your airways the way a decongestant does, but the cooling sensation makes breathing feel easier.
If you’re using a hot steam vaporizer (the plug-in kind that heats water to produce steam), add the camphor to cold water before turning the machine on. Never add camphor to already-hot water or microwave it. Camphor can splatter when it contacts hot liquid, causing burns. Follow your vaporizer’s instructions for water volume, then place one tablet (or the equivalent of about one tablespoon of camphor solution per quart of water) into the cold water reservoir. Breathe in the medicated steam at a comfortable distance, and repeat up to three times per day.
For children under two, camphor steam inhalation is not recommended without guidance from a pediatrician. The American Academy of Pediatrics has taken a strong stance on camphor safety for children, recommending in 1994 that camphor be removed from all medicinal products entirely due to poisoning risks.
For Muscle and Joint Pain
Camphor works as a topical pain reliever by triggering both warm and cool sensations on the skin while increasing blood flow to the area. This counterirritant effect distracts nerve endings from deeper pain signals, which is why camphor shows up in balms and rubs marketed for knee arthritis, muscle soreness, and nerve pain.
To use camphor tablets for pain relief, you need to dissolve them into a carrier oil (coconut oil and sesame oil are common choices). Crush one tablet and mix it into roughly two tablespoons of warmed carrier oil until it dissolves. The resulting concentration should stay well under the FDA’s legal limit of 11% camphor in any over-the-counter product. Apply the oil mixture to the sore area and massage it in gently. Do not apply it to broken skin, open wounds, or burns. Wash your hands thoroughly afterward so you don’t accidentally transfer camphor to your eyes or mouth.
If mixing your own preparation feels uncertain, store-bought topical products with camphor already blended at safe concentrations are a more reliable option.
As an Insect and Moth Repellent
Camphor tablets are widely used as a moth repellent in closets, drawers, and storage containers. Place one or two tablets in a small cloth pouch or open dish and set it among stored clothing or linens. The tablets slowly sublimate (turn from solid directly into vapor), releasing a scent that repels moths and other insects. Replace them once they’ve fully dissolved, typically every few weeks depending on ventilation and temperature.
Keep camphor tablets in areas that children and pets cannot access. Because the tablets are small, white, and sometimes resemble candy or medicine, accidental ingestion is a real risk. Store unused tablets in their original packaging, sealed and out of reach.
For Religious and Cultural Rituals
In many Hindu and Buddhist traditions, camphor tablets are burned during prayer ceremonies. The tablet is placed on a small metal plate or lamp and lit directly. Pure camphor burns completely without leaving residue, which carries symbolic significance in these practices.
If you burn camphor indoors, ventilation matters. Camphor vapor irritates the nose and throat and can cause coughing, wheezing, headache, and nausea at higher concentrations. Open a window or door to allow airflow during and after burning. Avoid burning camphor in small, enclosed rooms, and keep the flame away from anything flammable. Camphor is highly flammable and produces toxic gases when burned in large quantities.
Key Safety Precautions
Never swallow camphor tablets. Ingestion symptoms include burning in the mouth and throat, nausea, vomiting, muscle spasms, and seizures. These symptoms can appear rapidly. Since 1983, the FDA has limited camphor concentration in consumer products to no more than 11%, but tablets sold for household or religious use may contain pure camphor, making them far more dangerous if ingested.
Keep camphor away from your eyes and mucous membranes. When using it topically, always dilute it in a carrier oil rather than applying a crushed tablet directly to skin. Undiluted camphor can cause significant skin irritation.
- Storage: Keep tablets in a cool, dry place away from heat sources and open flames. Camphor is flammable and has a low ignition point.
- Children: Store all camphor products completely out of children’s reach. Poisoning cases disproportionately affect young children who mistake tablets for candy.
- Skin use: Do a patch test on a small area of skin before applying a camphor oil mixture to a larger area. Discontinue use if redness or irritation develops.
- Inhalation: Limit steam sessions to a few minutes at a time. Prolonged exposure to camphor vapor can cause headaches, confusion, and nausea.